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11.0 PRODUCTION DRIER
11.1 TESTING PRINCIPLE
The production drier / hopper is checked by collecting dried polymer from the bottom of the hopper
then testing it WITHOUT FURTHER DRYING to check the drier efficiency. This can be used to check
the drying temperature, drying time and desiccant.
The polymer MUST be transferred to the PET Plus barrel using a procedure that ensures that the
polymer does not come into contact with any external air. The Polymer Chip Transfer Vessel is
designed for this purpose.
11.2 POLYMER CHIP TRANSFER VESSEL
This is a metal cylinder containing a central dispensing mechanism that splits the cylinder into 2
chambers. Nitrogen is passed through the two chambers to purge any air from the device. One
chamber has a Schrader quick release inlet with a non-return valve. The second chamber has a 5
PSI (0.35Bar) pressure release valve.
The dispensing mechanism has an adjustable bore to preset the volume of polymer that will be
dispensed with each operation of the dispensing lever.
The transfer vessel will keep enough granules dry for up to ten tests and dispense the correct amount
required for each test (3.8g).
Add polymer to the top chamber
5 pis pressure relief valve
Surplus gas will discharge from this
Dispensing lever
valve
Schader quick release valve
Nitrogen gas inlet
PET Plus User Manual
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